Top 10 Undertale Bosses


The Top Ten

1 Sans Sans Sans or Sans the Skeleton is a character in the 2015 RPG Undertale created by Toby Fox. He is a lazy, pun-loving skeleton who is a supporting protagonist in the "pacifist" and "neutral" routes of Undertale, and a heroic antagonist/final boss of the "genocide" route. He is known for his incredibly difficult more.

Such a troll and the theme is so awesome I could listen to it for 10 weeks straight. I'm a lot like him too. I'm lazy and I can't stop making bad puns. I've listened to multiple versions of the song and all are rated over 1 million!

Seems like a cool boss, but I haven't got anywhere near the heart that a Genocide run requires. - Garythesnail

No explanation needed. Just prepare to get dunked on.

He's gonna give you a really bad time.

V 6 Comments
2 Mettaton Mettaton Mettaton is a character in the popular 2015 RPG game, Undertale. He is a robot with a soul built by Dr. Alphys, and is the sole television star of the underground. Mettaton is a popular character in the fanbase. His notable features include his legs, and his catchphrase "OH YESSSS!"

All right! I think we were all expecting Sans but I definitely think Mettaton is the best. He also has by far the best theme song and of course the best legs.

Wow! It's cool to see him at number one! He's probably my favorite. - Garythesnail

NO! I thought Mettaton was winning! I mean just LOOK AT DEM LEGS! (and ratings too! )

,I was half expecting to see sans here but its Mettaton! I think he deserves this place because on the pacifist run he has two forms,in genocide he has 3.

V 8 Comments
3 Asgore Dreemurr

The epic opening, breaking mercy, forced to fight the kindest monster in the underground, his final words, the bitter end. no other boss represents Undertale better than Asgore

This is a boss that is not only difficult, it's a pretty emotional one. He's reluctant to fight, he can't even look at you in the eye, the music fills the atmosphere, his attacks weaken as your HP lowers, etc. enough said.

4 Asriel Dreemurr Asriel Dreemurr Asriel Dreemurr is the child of Toriel and Asgore in the 2015 game Undertale made by Toby Fox. Asriel passed away prior to the games events, and is only mentioned of in the final moments of two of the games possible endings.

He's not the hardest boss but it is an amazing showdown

He's not very hard since you really can't lose, but he's the boss that'll probably pull on your heartstrings the most, only behind Asgore.

Asriels my personal favourite character and has a variety of attacks

V 1 Comment
5 Papyrus Papyrus Papyrus is a character from the 2015 game Undertale, made by Toby Fox . He is the Younger brother of Sans the skeleton, royal guard in training, and a sentry in the town of Snowdin . Opposite to his brother, papyrus is active, loud, and full of himself; but in an endearing way. Papyrus means to become more.

I love this boss but there is one downside, to spare him you just have to die to him 3 times (I think)

6 Photoshop Flowey

First thing that comes to mind: WHAT IN THE NAME OF ALL THAT IS LIFE IS THAT?! This guy has no strategy, no mercy, just pure bullet hell. The only reason I don't really consider him top 3 worthy is because he really isn't that hard (unless you're doing a no-hit run, then good luck).

V 1 Comment
7 Undyne the Undying

I am stuck on undyne the undying, and I just can't kill her!

8 Muffet Muffet

Her song is one of the best I've heard in this game, her fight is innovative, it's fairly challenging, enough said.

9 Toriel Toriel Toriel is a main character in Toby Fox's 2016 RPG, Undertale. She is an amazing blend of goat and mother.

She's definitely one of the easiest bosses, but also one of those bosses that can really pull on your heartstrings.

10 Mad Dummy V 1 Comment

The Contenders

11 Alphys NEO
12 Snowdrake's Mother V 1 Comment
13 Memoryhead V 1 Comment
14 Lemon Bread
15 Undyne Undyne Undyne is a main character in Toby Fox's 2016 RPG, Undertale. She is the heroic fishlike captain of the Royal Guard, who takes it upon herself to protect the monsters of the Underground. Her name is derived from the word "Undine", and is a pun on the word "Undying". Her most loved monsters are her mentor, more.
16 Glyde
17 Mettaton NEO V 1 Comment
18 Greater Dog Greater Dog

All of the dogs in the game are so cute! - Pegasister12

V 1 Comment
19 Reaper Bird Reaper Bird
20 Endogeny Endogeny
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List StatsUpdated 26 Feb 2017

100 votes
22 listings
1 year, 18 days old

Top Remixes (4)

1. Mettaton
2. Omega Flowey
3. Muffet
1. Photoshop Flowey
2. Mettaton
3. Papyrus
1. Alphys NEO
2. Sans
3. Undyne the Undying

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